Add workaround for slow host/service del
    
    host-del and service-del are slow because cert revokation is implemented
    inefficiently. The internal cert_find() call retrieves all certificates
    from Dogtag.
    
    The workaround special cases service and host find without additional RA
    search options. A search for service and host certs limits the scope to
    certificate with matching subject common name.
    
    See: https://pagure.io/freeipa/issue/7835
    Signed-off-by: Christian Heimes <cheimes@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>